The original Japanese title, Rockman World 2, is clearly different from the NES title, Rockman 2. Unfortunately, in the Western localization such distinction is lost, and both the NES and GB video games are called "Mega Man II" on their title screens.

The demented Dr. Wily is at it again! This time he's stolen the experimental Time Skimmer and skipped into the future. But Wait! Four of his strongest cyborgs have been left behind to squash the mighty Mega Man!

Time is of the essence as Mega Man and Rush blast past waves of maniacal metal monsters on the way to underground lair of Dr. Wily. Once there they must face Quint, the ferocious fiend from the future!